How to stop Timer after few seconds

Question

Here in myAPICall() method am calling another method I.e., COStatusAPI() for every 5 seconds upto 90 seconds.

Here COStatusAPI() is an API call. i.e., Am hitting server for every 5 seconds.
 In response I’ll get COStatus as 1 or 0.

If I get COStatus as 1, am stopping the timer and navigating to another viewController and If I get COStatus as 0 for 90 seconds. I am stopping the timer and showing alert.

But here my issue is timer is not getting stop. like, If I get COStatus as 1, in background timer is running. So, after 90 seconds am getting alert message.

In the same way until 90 seconds. If I am getting COStatus as 0 means am showing alert. This alert is go on repeating.

how to achieve this?. Could anyone help me with this

var myTimer : Timer?
var timeController : Bool = true

func myAPICall(){
    self.loadingview()
        if self.myTimer == nil {
             self.myTimer = Timer.scheduledTimer(timeInterval: 5.0, target: self, selector: #selector(self.COStatusAPI), userInfo: nil, repeats: self.timeController)
             }
}

@objc func COStatusAPI(){
        if COStatus == 0{
            self.timeController = true
            let when = DispatchTime.now() + 90
            DispatchQueue.main.asyncAfter(deadline: when) {
                self.timeController = false
                if self.acceptOrRejectTimer != nil {
                    self.acceptOrRejectTimer!.invalidate()
                    self.acceptOrRejectTimer = nil
                }
                self.hideloadingView()
        //showing alert
            }
        }
        if COStatus == 1{
                self.timeController = false
                if self.acceptOrRejectTimer != nil {
                    self.acceptOrRejectTimer!.invalidate()
                    self.acceptOrRejectTimer = nil
                }
                self.hideloadingview()
        //navigating to next view controller
        }

}

Answer 1

• Forget DispatchQueue.main.asyncAfter.
• Create an Int counter property with value 18.
• In COStatusAPI() make the API call.
• if COStatus == 1
  • invalidate() the timer and go to the next controller.
• else
  • decrement the counter.
  • if the counter reaches 0 invalidate() the timer and show the alert.

---

var myTimer : Timer?
var counter = 0

func myAPICall(){
    self.loadingview()
    if self.myTimer == nil {
        counter = 18
        self.myTimer = Timer.scheduledTimer(timeInterval: 5.0,
                                            target: self,
                                            selector: #selector(COStatusAPI),
                                            userInfo: nil,
                                            repeats: true)
    }
}

@objc func COStatusAPI(_ timer: Timer) {

    // call API
    switch COStatus {
    case 0: 
        counter -= 1
        if counter == 0 {
            timer.invalidate()
            self.myTimer = nil
            //showing alert
        }
    case 1: 
        timer.invalidate()
        self.myTimer = nil
        //navigating to next view controller

    default: break
    }
}